Barotropic tides in MPAS-Ocean (E3SM V2): impact of ice shelf cavities
<p>Oceanic tides are seldom represented in Earth system models (ESMs) owing to the need for high horizontal resolution to accurately represent the associated barotropic waves close to coasts. This paper presents results of tides implemented in the Model for Prediction Across Scales–Ocean or MP...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2023-02-01
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| Series: | Geoscientific Model Development |
| Online Access: | https://gmd.copernicus.org/articles/16/1297/2023/gmd-16-1297-2023.pdf |
| _version_ | 1797897164506005504 |
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| author | N. Pal N. Pal K. N. Barton M. R. Petersen S. R. Brus D. Engwirda B. K. Arbic A. F. Roberts J. J. Westerink D. Wirasaet |
| author_facet | N. Pal N. Pal K. N. Barton M. R. Petersen S. R. Brus D. Engwirda B. K. Arbic A. F. Roberts J. J. Westerink D. Wirasaet |
| author_sort | N. Pal |
| collection | DOAJ |
| description | <p>Oceanic tides are seldom represented in Earth system models (ESMs) owing to the need for high horizontal resolution to accurately represent the associated barotropic waves close to coasts. This paper presents results of tides implemented in the Model for Prediction Across Scales–Ocean or MPAS-Ocean, which is the ocean component within the U.S. Department of Energy developed Energy Exascale Earth System Model (E3SM). MPAS-Ocean circumvents the limitation of low resolution using unstructured global meshing. We are at this stage simulating the largest semidiurnal (<span class="inline-formula">M<sub>2</sub></span>, <span class="inline-formula">S<sub>2</sub></span>, <span class="inline-formula">N<sub>2</sub></span>) and diurnal (<span class="inline-formula">K<sub>1</sub></span>, <span class="inline-formula">O<sub>1</sub></span>) tidal constituents in a single-layer version of MPAS-O. First, we show that the tidal constituents calculated using MPAS-Ocean closely agree with the results of the global tidal prediction model TPXO8 when suitably tuned topographic wave drag and bottom drag coefficients are employed. Thereafter, we present the sensitivity of global tidal evolution due to the presence of Antarctic ice shelf cavities. The effect of ice shelves on the amplitude and phase of tidal constituents are presented. Lower values of complex errors (with respect to TPXO8 results) for the <span class="inline-formula">M<sub>2</sub></span> tidal constituents are observed when the ice shelf is added in the simulations, with particularly strong improvement in the Southern Ocean. Our work points towards future research with varying Antarctic ice shelf geometries and sea ice coupling that might lead to better comparison and prediction of tides and thus better prediction of sea-level rise and also the future climate variability.</p> |
| first_indexed | 2024-04-10T07:53:15Z |
| format | Article |
| id | doaj.art-87c432b91fd24940b4a415d87d8271d3 |
| institution | Directory Open Access Journal |
| issn | 1991-959X 1991-9603 |
| language | English |
| last_indexed | 2024-04-10T07:53:15Z |
| publishDate | 2023-02-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Geoscientific Model Development |
| spelling | doaj.art-87c432b91fd24940b4a415d87d8271d32023-02-23T07:07:06ZengCopernicus PublicationsGeoscientific Model Development1991-959X1991-96032023-02-01161297131410.5194/gmd-16-1297-2023Barotropic tides in MPAS-Ocean (E3SM V2): impact of ice shelf cavitiesN. Pal0N. Pal1K. N. Barton2M. R. Petersen3S. R. Brus4D. Engwirda5B. K. Arbic6A. F. Roberts7J. J. Westerink8D. Wirasaet9Los Alamos National Laboratory, Los Alamos, NM 87545, USACentre for Ocean, River, Atmosphere and Land Sciences, Indian Institute of Technology, Kharagpur, 721302, IndiaDepartment of Physics, University of Michigan, Ann Arbor, MI 48109, USALos Alamos National Laboratory, Los Alamos, NM 87545, USAArgonne National Laboratory, Lemont, IL 60439, USALos Alamos National Laboratory, Los Alamos, NM 87545, USADepartment of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109, USALos Alamos National Laboratory, Los Alamos, NM 87545, USADepartment of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, 156 Fitzpatrick Hall, Notre Dame, IN 46556, USADepartment of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, 156 Fitzpatrick Hall, Notre Dame, IN 46556, USA<p>Oceanic tides are seldom represented in Earth system models (ESMs) owing to the need for high horizontal resolution to accurately represent the associated barotropic waves close to coasts. This paper presents results of tides implemented in the Model for Prediction Across Scales–Ocean or MPAS-Ocean, which is the ocean component within the U.S. Department of Energy developed Energy Exascale Earth System Model (E3SM). MPAS-Ocean circumvents the limitation of low resolution using unstructured global meshing. We are at this stage simulating the largest semidiurnal (<span class="inline-formula">M<sub>2</sub></span>, <span class="inline-formula">S<sub>2</sub></span>, <span class="inline-formula">N<sub>2</sub></span>) and diurnal (<span class="inline-formula">K<sub>1</sub></span>, <span class="inline-formula">O<sub>1</sub></span>) tidal constituents in a single-layer version of MPAS-O. First, we show that the tidal constituents calculated using MPAS-Ocean closely agree with the results of the global tidal prediction model TPXO8 when suitably tuned topographic wave drag and bottom drag coefficients are employed. Thereafter, we present the sensitivity of global tidal evolution due to the presence of Antarctic ice shelf cavities. The effect of ice shelves on the amplitude and phase of tidal constituents are presented. Lower values of complex errors (with respect to TPXO8 results) for the <span class="inline-formula">M<sub>2</sub></span> tidal constituents are observed when the ice shelf is added in the simulations, with particularly strong improvement in the Southern Ocean. Our work points towards future research with varying Antarctic ice shelf geometries and sea ice coupling that might lead to better comparison and prediction of tides and thus better prediction of sea-level rise and also the future climate variability.</p>https://gmd.copernicus.org/articles/16/1297/2023/gmd-16-1297-2023.pdf |
| spellingShingle | N. Pal N. Pal K. N. Barton M. R. Petersen S. R. Brus D. Engwirda B. K. Arbic A. F. Roberts J. J. Westerink D. Wirasaet Barotropic tides in MPAS-Ocean (E3SM V2): impact of ice shelf cavities Geoscientific Model Development |
| title | Barotropic tides in MPAS-Ocean (E3SM V2): impact of ice shelf cavities |
| title_full | Barotropic tides in MPAS-Ocean (E3SM V2): impact of ice shelf cavities |
| title_fullStr | Barotropic tides in MPAS-Ocean (E3SM V2): impact of ice shelf cavities |
| title_full_unstemmed | Barotropic tides in MPAS-Ocean (E3SM V2): impact of ice shelf cavities |
| title_short | Barotropic tides in MPAS-Ocean (E3SM V2): impact of ice shelf cavities |
| title_sort | barotropic tides in mpas ocean e3sm v2 impact of ice shelf cavities |
| url | https://gmd.copernicus.org/articles/16/1297/2023/gmd-16-1297-2023.pdf |
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